Approved only for $500

I have a 710 credit score but I only got approved for $500… I’ll try the 91/3 rule but will I get a big increase if I properly manage the card. Also I was stuck between this and the Flagship for travel wasn’t sure which one is better

I have a 710 credit score but I only got approved for $500… I’ll try the 91/3 rule but will I get a big increase if I properly manage the card. Also I was stuck between this and the Flagship for travel wasn’t sure which one is better